Andy's Tech Memo
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Posted on In

A readline usage example

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#!/bin/bash

input="$1"
m=(0)
while IFS= read -r line
do
  # do something
  # echo "$line"
  echo $line > $m.html
  m=$((m+1))
done < "$input"

Posted on In

ffmpeg one liners

Cut video based on time

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ffmpeg -i movie.mp4 -ss 00:00:03 -t 00:00:08 -c copy cut.mp4

or

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ffmpeg -i movie.mp4 -ss 00:00:03 -to 00:02:03 -c copy cut.mp4

Rotate video without re-encoding

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ffmpeg -autorotate -i input.mp4 -map_metadata 0 -metadata:s:v rotate="0" -codec copy output.mp4